US20150048463A1 - Package device for microelectromechanical inertial sensor - Google Patents
Package device for microelectromechanical inertial sensor Download PDFInfo
- Publication number
- US20150048463A1 US20150048463A1 US13/968,830 US201313968830A US2015048463A1 US 20150048463 A1 US20150048463 A1 US 20150048463A1 US 201313968830 A US201313968830 A US 201313968830A US 2015048463 A1 US2015048463 A1 US 2015048463A1
- Authority
- US
- United States
- Prior art keywords
- microelectromechanical
- inertial sensor
- chip
- ceramic substrate
- package device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81C—PROCESSES OR APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OR TREATMENT OF MICROSTRUCTURAL DEVICES OR SYSTEMS
- B81C1/00—Manufacture or treatment of devices or systems in or on a substrate
- B81C1/00015—Manufacture or treatment of devices or systems in or on a substrate for manufacturing microsystems
- B81C1/00222—Integrating an electronic processing unit with a micromechanical structure
- B81C1/0023—Packaging together an electronic processing unit die and a micromechanical structure die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B7/00—Microstructural systems; Auxiliary parts of microstructural devices or systems
- B81B7/0032—Packages or encapsulation
- B81B7/007—Interconnections between the MEMS and external electrical signals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B2201/00—Specific applications of microelectromechanical systems
- B81B2201/02—Sensors
- B81B2201/0228—Inertial sensors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
- H01L2224/161—Disposition
- H01L2224/16151—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/16221—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/16225—Disposition the bump connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/4805—Shape
- H01L2224/4809—Loop shape
- H01L2224/48091—Arched
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/1615—Shape
- H01L2924/16195—Flat cap [not enclosing an internal cavity]
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/161—Cap
- H01L2924/162—Disposition
- H01L2924/16235—Connecting to a semiconductor or solid-state bodies, i.e. cap-to-chip
Definitions
- the abovementioned conventional complicated package structure of a microelectromechanical inertial sensor has a higher package cost.
- the electric connection thereof is realized by a wire-bonding technology.
- the microelectromechanical chip is verified to operate normally after wire-bonding, the succeeding resin molding process may damage the bonding wires and lower the yield thereof
- its expensive manufacturing process caused the higher fabrication cost.
- FIG. 2 schematically shows another conventional package structure of a microelectromechanical inertial sensor
- the present invention is characterized in that the ceramic substrate has two accommodation spaces where an MEMS chip and an IC chip are respectively mounted, and that the MEMS chip and the IC chip are mounted in a flip-chip technology, and that a metal top cover is used to seal the MEMS chip.
- the present invention can raise the reliability and yield of the products.
- a metallic ring 41 and the top cover 42 are arranged on the top of the H-shaped substrate 30 to seal the MEMS chip 36 and keep the upper accommodation space 32 in a highly hermetic state or a vacuum state, whereby the microelectromechanical component 38 is able to operate normally and exempted from interference.
- the IC chip 44 is arranged inside the lower accommodation space 34 upward from the bottom of the H-shaped substrate 30 in a flip-chip method and electrically connected with the interconnect metal lines by a plurality of second electric-conduction bumps 46 .
- a plurality of electric-conduction pads 48 is arranged on the perimeter of the bottom surface of the H-shaped substrate 30 .
- FIG. 7 schematically shows a package device for a microelectromechanical inertial sensor according to another embodiment of the present invention.
- the package device for a microelectromechanical inertial sensor comprises a H-shaped ceramic substrate 30 , an MEMS chip 36 , a top cover 42 , and an IC chip 44 .
- the H-shaped ceramic substrate 30 has an upper accommodation space 32 and a lower accommodation space 34 , which are respectively formed on the upper side and lower side of the H-shaped ceramic substrate 30 .
- the H-shaped ceramic substrate 30 is formed via stacking several layers of substrates having a plurality of interconnect metal lines (not shown in the drawings) thereinside. At least one microelectromechanical component 38 has been fabricated in the MEMS chip 36 beforehand.
- the MEMS chip 36 is arranged inside the upper accommodation space 32 downward from the top of the H-shaped substrate 30 and electrically connected with the interconnect metal lines by a plurality of first bonding wires 39 .
- a metallic ring 41 and the top cover 42 are arranged on the top of the H-shaped ceramic substrate 30 to seal the MEMS chip 36 and keep the upper accommodation space 32 in a highly hermetic state or a vacuum state.
- the IC chip 44 is arranged inside the lower accommodation space 34 upward from the bottom of the H-shaped substrate 30 and electrically connected with the interconnect metal lines by a plurality of second bonding wires 45 .
- a plurality of electric-conduction pads 48 is arranged on the perimeter of the bottom surface of the H-shaped ceramic substrate 30 .
- the MEMS chip will be tested and classified after the hermetic or vacuum environment has been established inside the upper accommodation space.
- the package process will not be continued unless the MEMS chip in the ceramic substrate has been qualified. Therefore, the present invention can decrease the defective rate, raise the yield, and reduce the fabrication cost.
Abstract
A package device for a microelectromechanical inertial sensor comprises a ceramic substrate having an upper accommodation space and a lower accommodation and having a plurality of interconnect metal lines thereinside; a microelectromechanical system (MEMS) chip mounted inside the upper accommodation of the ceramic substrate and electrically connected with the interconnect metal lines; a top cover arranged on the ceramic substrate and sealing the upper accommodation space; and an integrated circuit (IC) chip mounted inside the lower accommodation space and electrically connected with the interconnect metal lines. The present invention can improve the reliability of components, increase the yield and decrease the fabrication cost.
Description
- 1. Field of the Invention
- The present invention relates to a package structure for a sensor, particularly to a package device for a microelectromechanical inertial sensor.
- 2. Description of the Related Art
- In semiconductor industry, the micromaching technology is used to fabricate various micro sensors and micro actuators. Further, the micro sensor or micro actuator may be integrated with a micro electronic circuit to form MEMS (microelectromechanical system). The fabrication of MEMS components involves many fields of technologies. However, most MEMS components, such as inertial sensors, contain a floating structure fabricated by the micromachining technology and only having few support points to increase sensitivity.
- Refer to
FIG. 1 for a conventional package structure of a microelectromechanical inertial sensor. In the conventional package structure of a microelectromechanical inertial sensor, an IC (Integrated Circuit)chip 12 is arranged on asubstrate 10. TheIC chip 12 is electrically connected with the wiring of thesubstrate 10 by a plurality ofbonding wires 14. Amicroelectromechanical chip 16 having amicroelectromechanical component 18 is arranged on theIC chip 12 and electrically connected with theIC chip 12 by a plurality ofbonding wires 20. Asilicon top cover 22 covers themicroelectromechanical chip 16 and hermetic seals themicroelectromechanical component 18. Then, asealing resin 24 wraps theIC chip 12, themicroelectromechanical chip 16, thesilicon top cover 22, and thebonding wires - Refer to
FIG. 2 for another conventional package structure of a microelectromechanical inertial sensor. In the package structure of the microelectromechanical inertial sensor, an IC (Integrated Circuit)chip 54 is arranged on asubstrate 50 and mounted in agroove 52 of thesubstrate 50. TheIC chip 54 is electrically connected with the wiring of thesubstrate 50 by a plurality of flip-chip bumps 56. Amicroelectromechanical chip 58 having amicroelectromechanical component 60 is arranged on theIC chip 54 and electrically connected with theIC chip 54 by a plurality ofbonding wires 62. Asilicon cover 61 hermetic seals themicroelectromechanical component 60 and a top cover covers themicroelectromechanical chip 58 and covers themicroelectromechanical chip 58, theIC chip 54,bumps 56, and thebonding wires 62. Thereby is completed the package structure of the microelectromechanical inertial sensor. - Refer to
FIG. 3 for further another conventional package structure of a microelectromechanical inertial sensor. In the package structure of the microelectromechanical inertial sensor, a microelectromechanical and IC (Integrated Circuit)chip 64 having amicroelectromechanical component 65 is arranged on asubstrate 66 and mounted in agroove 68 of thesubstrate 66. Thechip 64 is electrically connected with the wiring of thesubstrate 66 by a plurality ofbonding wires 70. Atop cover 72 covers thechip 64 and hermetic seals thechip 64, and thebonding wires 62. Thereby is completed the package structure of the microelectromechanical inertial sensor. - However, the abovementioned conventional complicated package structure of a microelectromechanical inertial sensor has a higher package cost. The electric connection thereof is realized by a wire-bonding technology. Although the microelectromechanical chip is verified to operate normally after wire-bonding, the succeeding resin molding process may damage the bonding wires and lower the yield thereof Furthermore, in order to reduce the cost of packaging and design special integrated process, its expensive manufacturing process caused the higher fabrication cost.
- Accordingly, the present invention proposes a novel package device for a microelectromechanical inertial sensor to overcome the problems (such as the high defective rate) of the conventional microelectromechanical package technology without increasing the fabrication cost.
- The primary objective of the present invention is to provide a package device for a microelectromechanical inertial sensor to raise the reliability and yield of the products and lower the fabrication cost thereof.
- Another objective of the present invention is to provide a package device for a microelectromechanical inertial sensor, wherein the IC chip is mounted after the test of the MEMS chip so as to decrease the defective rate of the products.
- To achieve the abovementioned objectives, the present invention proposes a package device for a microelectromechanical inertial sensor, which comprises a ceramic substrate, an MEMS chip, a top cover, and an IC chip. The ceramic substrate is a high-temperature or low-temperature co-fired multilayer ceramic substrate. The ceramic substrate has an upper accommodation space and a lower accommodation space. The ceramic substrate also has a plurality of interconnect metal lines thereinside. The MEMS chip has microelectromechanical components and is mounted in the upper accommodation space and electrically connected with the ceramic substrate. The IC chip is mounted in the lower accommodation space and electrically connected with the ceramic substrate . The MEMS chip is electrically connected with the IC chip by the interconnect metal lines of the ceramic substrate. The top cover and a metallic ring are arranged on the ceramic substrate to seal the MEMS components and keep the upper accommodation space in an hermetic state or a vacuum state. Compared with the resin-based package, the ceramic substrate-based package has lower residual stress and higher yield.
- In one embodiment, the ceramic substrate is an H-shaped substrate; the MEMS chip is mounted in the upper accommodation space thereof, and the IC chip is mounted in the lower accommodation space thereof.
- Below, embodiments are described in detail in cooperation with the attached drawings to make easily understood the objectives, technical contents, characteristics and accomplishments of the present invention.
-
FIG. 1 schematically shows a conventional package structure of a microelectromechanical inertial sensor; -
FIG. 2 schematically shows another conventional package structure of a microelectromechanical inertial sensor; -
FIG. 3 schematically shows a further another conventional package structure of a microelectromechanical inertial sensor; -
FIG. 4 schematically shows a package device for a microelectromechanical inertial sensor according to one embodiment of the present invention; -
FIG. 5 shows a perspective exploded view of the package device shown inFIG. 4 . -
FIG. 6 schematically shows electric-conduction pads arranged on the bottom surface of the ceramic substrate according to one embodiment of the present invention; and -
FIG. 7 schematically shows a package device for a microelectromechanical inertial sensor according to another embodiment of the present invention. - The present invention is characterized in that the ceramic substrate has two accommodation spaces where an MEMS chip and an IC chip are respectively mounted, and that the MEMS chip and the IC chip are mounted in a flip-chip technology, and that a metal top cover is used to seal the MEMS chip. Thereby, the present invention can raise the reliability and yield of the products.
- Refer to
FIG. 4 andFIG. 5 .FIG. 4 schematically shows a package device for a microelectromechanical inertial sensor according to one embodiment of the present invention.FIG. 5 shows a perspective exploded view of the package device shown inFIG. 4 . In the embodiment shown inFIG. 4 andFIG. 5 , the package device for a microelectromechanical inertial sensor comprises a ceramic substrate, anMEMS chip 36, atop cover 42, and anIC chip 44. The ceramic substrate is a high-temperature or low-temperature co-fired multilayer ceramic substrate. In this embodiment, the ceramic substrate is exemplified by an H-shaped substrate 30. The H-shaped substrate 30 has anupper accommodation space 32 and alower accommodation space 34, which are respectively formed on the upper side and lower side of the H-shaped substrate 30. In this embodiment, the H-shaped substrate 30 is formed via stacking several layers of substrates having a plurality of interconnect metal lines (not shown in the drawings) thereinside. At least onemicroelectromechanical component 38 has been fabricated in theMEMS chip 36 beforehand. TheMEMS chip 36 is arranged inside theupper accommodation space 32 downward from the top of the H-shapedsubstrate 30 in a flip-chip method and electrically connected with the interconnect metal lines by a plurality of first electric-conduction bumps 40. Ametallic ring 41 and the top cover 42 (preferably made of a metallic material) are arranged on the top of the H-shapedsubstrate 30 to seal theMEMS chip 36 and keep theupper accommodation space 32 in a highly hermetic state or a vacuum state, whereby themicroelectromechanical component 38 is able to operate normally and exempted from interference. TheIC chip 44 is arranged inside thelower accommodation space 34 upward from the bottom of the H-shapedsubstrate 30 in a flip-chip method and electrically connected with the interconnect metal lines by a plurality of second electric-conduction bumps 46. A plurality of electric-conduction pads 48 is arranged on the perimeter of the bottom surface of the H-shapedsubstrate 30. In the present invention, the H-shapedsubstrate 30 may be designed to have different quantities and different distribution patterns of the electric-conduction pads 48 according to different requirements. For example, there are six electric-conduction pads 48 in the embodiment shown inFIG. 6 . However, the present invention is not limited by the embodiment shown inFIG. 6 . The electric-conduction pads 48 are electrically connected with the interconnect metal lines, functioning as contact points to the external printed circuit board for signal communication. - In addition to the abovementioned embodiment, electrically connection structures have other forms in other embodiments. Refer to
FIG. 7 .FIG. 7 schematically shows a package device for a microelectromechanical inertial sensor according to another embodiment of the present invention. - In the embodiment shown in
FIG. 7 , the package device for a microelectromechanical inertial sensor comprises a H-shapedceramic substrate 30, anMEMS chip 36, atop cover 42, and anIC chip 44. Similarly, the H-shapedceramic substrate 30 has anupper accommodation space 32 and alower accommodation space 34, which are respectively formed on the upper side and lower side of the H-shapedceramic substrate 30. In this embodiment, the H-shapedceramic substrate 30 is formed via stacking several layers of substrates having a plurality of interconnect metal lines (not shown in the drawings) thereinside. At least onemicroelectromechanical component 38 has been fabricated in theMEMS chip 36 beforehand. TheMEMS chip 36 is arranged inside theupper accommodation space 32 downward from the top of the H-shapedsubstrate 30 and electrically connected with the interconnect metal lines by a plurality offirst bonding wires 39. Ametallic ring 41 and thetop cover 42 are arranged on the top of the H-shapedceramic substrate 30 to seal theMEMS chip 36 and keep theupper accommodation space 32 in a highly hermetic state or a vacuum state. TheIC chip 44 is arranged inside thelower accommodation space 34 upward from the bottom of the H-shapedsubstrate 30 and electrically connected with the interconnect metal lines by a plurality ofsecond bonding wires 45. A plurality of electric-conduction pads 48 is arranged on the perimeter of the bottom surface of the H-shapedceramic substrate 30. In the present invention, the MEMS chip will be tested and classified after the hermetic or vacuum environment has been established inside the upper accommodation space. The package process will not be continued unless the MEMS chip in the ceramic substrate has been qualified. Therefore, the present invention can decrease the defective rate, raise the yield, and reduce the fabrication cost. - The embodiments described above are to demonstrate the technical thought and characteristics of the present invention to enable the persons skilled in the art to understand, make, and use the present invention. However, these embodiments are not intended to limit the scope of the present invention. Any equivalent modification or variation according to the spirit of the present invention is to be also included within the scope of the present invention.
Claims (10)
1. A package device for a microelectromechanical inertial sensor, comprising
a ceramic substrate having an upper accommodation space and a lower accommodation and having a plurality of interconnect metal lines thereinside;
a microelectromechanical system (MEMS) chip having at least one microelectromechanical component, mounted inside said upper accommodation of said ceramic substrate and electrically connected with said interconnect metal lines;
a top cover arranged on said ceramic substrate and sealing said upper accommodation space; and
an integrated circuit (IC) chip mounted inside said lower accommodation space and electrically connected with said interconnect metal lines.
2. The package device for a microelectromechanical inertial sensor according to claim 1 , wherein said ceramic substrate is an H-shaped substrate, and wherein said MEMS chip is mounted in said upper accommodation space in a flip-chip method, and wherein said IC chip is mounted in said lower accommodation space in a flip-chip method.
3. The package device for a microelectromechanical inertial sensor according to claim 2 , wherein said ceramic substrate is formed via stacking a plurality of layers of substrates.
4. The package device for a microelectromechanical inertial sensor according to claim 2 , wherein said microelectromechanical system (MEMS) chip electrically connected with said interconnect metal lines by a plurality of first electric-conduction bumps or first bonding wires.
5. The package device for a microelectromechanical inertial sensor according to claim 4 , wherein said integrated circuit (IC) chip mounted inside said lower accommodation space and electrically connected with said interconnect metal lines by a plurality of second electric-conduction bumps or second bonding wires.
6. The package device for a microelectromechanical inertial sensor according to claim 1 , wherein said top cover is a metallic top cover.
7. The package device for a microelectromechanical inertial sensor according to claim 1 , wherein said upper accommodation space is hermetic sealed to have a vacuum state.
8. The package device for a microelectromechanical inertial sensor according to claim 1 further comprising a plurality of electric-conduction pads arranged on a bottom surface of said ceramic substrate and electrically connected with said interconnect metal lines to function as contact points for external communication.
9. The package device for a microelectromechanical inertial sensor according to claim 1 , wherein said ceramic substrate is made of a high-temperature co-fired multilayer ceramic or a low-temperature co-fired multilayer ceramic.
10. The package device for a microelectromechanical inertial sensor according to claim 6 , wherein a metallic ring is arranged between said ceramic substrate and said top cover.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/968,830 US20150048463A1 (en) | 2013-08-16 | 2013-08-16 | Package device for microelectromechanical inertial sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US13/968,830 US20150048463A1 (en) | 2013-08-16 | 2013-08-16 | Package device for microelectromechanical inertial sensor |
Publications (1)
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US20150048463A1 true US20150048463A1 (en) | 2015-02-19 |
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Family Applications (1)
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US13/968,830 Abandoned US20150048463A1 (en) | 2013-08-16 | 2013-08-16 | Package device for microelectromechanical inertial sensor |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220288599A1 (en) * | 2019-08-23 | 2022-09-15 | Bühler AG | Roller with a sensor |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040016995A1 (en) * | 2002-07-25 | 2004-01-29 | Kuo Shun Meen | MEMS control chip integration |
US20060220210A1 (en) * | 2005-03-31 | 2006-10-05 | Stats Chippac Ltd. | Semiconductor assembly including chip scale package and second substrate and having exposed substrate surfaces on upper and lower sides |
US20090151972A1 (en) * | 2004-05-28 | 2009-06-18 | Stellar Microdevices, Inc. | Cold weld hermetic mems package and method of manufacture |
-
2013
- 2013-08-16 US US13/968,830 patent/US20150048463A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040016995A1 (en) * | 2002-07-25 | 2004-01-29 | Kuo Shun Meen | MEMS control chip integration |
US20090151972A1 (en) * | 2004-05-28 | 2009-06-18 | Stellar Microdevices, Inc. | Cold weld hermetic mems package and method of manufacture |
US20060220210A1 (en) * | 2005-03-31 | 2006-10-05 | Stats Chippac Ltd. | Semiconductor assembly including chip scale package and second substrate and having exposed substrate surfaces on upper and lower sides |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20220288599A1 (en) * | 2019-08-23 | 2022-09-15 | Bühler AG | Roller with a sensor |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: TXC CORPORATION, TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHIANG, CHIEN-WEI;REEL/FRAME:031201/0054 Effective date: 20130801 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |